For me its Hopkins boxing brain, floyds reflexes, gatti's heart, Mosleys punch, Pacquiaos hand-speed, Hopkins or floyds ring awareness, old roy jones swagger, pacquiaos calves, marquez witt, bradleys build, prime oscars jab and margaritos chin probably more i shoulda mentioned,, ooo yea and chavez body work... tysons tenacity.. and exstaticness..